Free functions for texturing, point clouds, and trace #3707

Job	Run time
macos-13 C++17 py3.11 MacOS-13 llvm17	32m 41s
VFX2021 gcc9/C++17 llvm11 py3.7 oiio2.3 sse4 batch-b8avx2	31m 31s
macos-14 C++17 py3.11 MacOS-14-ARM llvm17	11m 26s
Ubuntu Debug gcc7/C++17 llvm9 py3.7 oiio2.3 exr2.4 sse4 exr2.4	40m 49s
VFX2022 gcc9/C++17 llvm13 py3.9 oiio-rel avx2	23m 1s
Ubuntu gcc10/C++17 llvm10 oiio-release avx2	11m 45s
VFX2022 clang12/C++17 llvm12 oiio-master py3.9 avx2 batch-avx512	28m 26s
Ubuntu latest releases gcc11/C++17 llvm16 exr3.2 py3.9 avx2 batch-b16avx512	24m 34s
VFX2022 icc/C++17 llvm14 py3.9 oiio-master avx2	43m 30s
Ubuntu bleeding edge gcc12/C++17 llvm17 oiio/ocio/exr/pybind-master py3.10 avx2 batch-b16avx512	25m 28s
VFX2022 icx/C++17 llvm14 py3.9 oiio2.3 avx2	32m 24s
Ubuntu clang14/C++17 llvm14 py3.8 avx2 batch-b16avx512	31m 41s
VFX2023 gcc11/C++17 llvm15 py3.10 oiio-rel avx2	38m 42s
Ubuntu clang-format	2m 13s
VFX2023 GPU Cuda11 gcc11/C++17 llvm15 py3.10 OIIO-master avx2	4m 44s
VFX2024 gcc11/C++17 llvm17 py3.11 boost1.82 oiio-rel avx2	24m 57s
VFX2021 oldest everything gcc9/C++17 llvm9 py3.7 oiio2.3 no-simd	11m 11s
VFX2022 sanitizers	35m 56s
VFX2023 abi check	14m 15s
	7h 49m 14s

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